$\frac{\:cos\theta\:+tan\theta\:}{cos\theta\:.tan\theta\:}=ctg\theta\:+sec\theta\:$

$\int\frac{\left(x+1\right)}{\sqrt{2x-1}}dx$

$y=\left[\frac{\left(3x+4\right)}{4x+3}\right]^4$

$\frac{\sqrt{0}-\sqrt{b}}{\sqrt{0}+\sqrt{6}}$

$-r^2\:+\:\frac{1}{4}r\:+\:2\frac{3}{8}r$

$e^2^{-2x+1}$

$4\:.\:4\:.\:4\:.\:4\:$